JPS58106981A - Still picture reproducing and transmitting device - Google Patents

Abstract

PURPOSE:To reproduce and transmit a still picture with a short queuing time and a high picture quality, by transmitting a reproduced output to another terminal on a basis of a video signal written in a memory during the write operation to a memory of one reproducing and outputting system. CONSTITUTION:Plural reproducing and outputting systems 1-3 having the same constitution are connected to a disc 1 of a recording medium so that information of the video signal reproduced from the disc 1 can be transferred to them. Plural terminals 1-3 having monitor screens or the like are connected to reproducing and outputting systems 1-3. Still pictures are displayed on monitor screens or the like of terminals 1 and 2 on a basis of one-field components of video signal, at least, from the time when the first one-field components of video signal are written in memories of output systems of terminals 1 and 2 of reproducing and outputting systems 1 and 2. Thus, a still picture reproducing and transmission request is issued from two terminals 1 and 2, and the time delay for switching is short even if their requests overlap, and further, still pictures are reproduced and transmitted with a high picture quality finally.

Description

[Detailed Description of the Invention] A still U in which a color video image No. 6 is encoded (PCM) and recorded on a disk-shaped recording medium, and then reproduced.
The itrs live transmission device 1 has been rejected. Since the recording speed of encoded video signals increases dramatically, it is necessary to greatly increase the relative scanning speed between the recording medium and the recording/playback head, or to increase the number of tracks stored in parallel. Otherwise, it would be difficult to record/play back at the same speed as the video signal.Increasing the relative scanning speed will lead to a decrease in the quality of the playback signal, and it will also be difficult to increase the number of tracks. This leads to equipment complexity.

For this reason, as a simple stationary l1ili Niu delivery device,
It is known that one frame's worth of recording/8 raw time is greatly slowed down by 60 times #1 degree. With such a device, it is possible to obtain video No. 1g in which the time axis of the regular video signal is expanded, so this is stored in the memory, and the memory is pushed out to return to the regular time axis. The name with the name sugigeki is used.

As such a conventional stationary 11j transmission device, those shown in FIGS. 1 to 3 are known.

The one in Fig. wJ1 shows the encoded image signal recorded daily on the recording medium disk (1) at a rate of approximately 0.0.
It is played back at a speed of 4 seconds, and the information is transferred by writing the raw video number in the memo ')-121 that has one field's worth of memory. From this memory +21, a color framing circuit (3 ) is used. In other words, the wave number f8c of the color subcarrier of the NTSC signal is set to the 1st and 4th odd-numbered floors of the water wave frequency fH ( 455 times). Therefore within the same field.

The chroma phase is reversed every scan. 1st F V-
In the second frame and the second frame, the chroma phase of the same scan is reversed. Therefore, N'l'8 (No. 11 returns to the chroma phase or the same state as the first field in the 5th field with 1st field to 4th field ('2 frames as one unit). In the device shown in the figure, switching from one still image to the next takes approximately 0.00 seconds, which is the information transfer time for one field of the disk (IJ).
It was done in 4 seconds, and the 7 shots made by switching between still images were nothing short of spectacular. However, since 4 fields (2 frames) of video signals are generated from 1 field's worth of video signals, the 11I loss in the framing cycle M133 is large, and high-quality still ll1li is I can't serve you.
It has the following drawback.

Using the device shown in Fig. 2, information is transferred from the line and disk (11) to the video signal for two fields, and this is written to the memo 'J-(4), which has a storage capacity for two fields. It continues on the time axis of the regular video signal.In length, color - 7 times *151, 4 fields sequentiality is 1 from the video signal of 2 fields N T 80 power color video delivery In this stationary th Niu sending fcll, -
The quality is improved by 6 compared to the one shown in Figure 1, but it takes about 0.0% to transfer tw% of 2 fields from disk (1) for 1 hour.
It takes 8 seconds, and it takes about 0.8 seconds to switch from one still image to the next, and the flicker when switching from one still image to another is noticeable.

Furthermore, in the 61st device, information is transferred from the disk (13) to a video signal for 4 fields, and this is written to a memory (6) having a recording capacity of 4 fields. A force of N'l' 8 C is obtained in succession on the shaft.In the Niu delivery device shown in FIG.

This is because a color framing circuit is not required since the video signal is generated entirely internally using 4 fields of video signals.

1 contribution is the best. However, take note of the video signal for 4 fields from disk (1)! Approximately 1 to transfer to J-(6)
．． It has the disadvantage that when switching between 6 episodes or 5 still images, a blank screen appears.

In addition, on the TisF+13, there are 10 still images recorded on one disk [IJ], 18 still images on one fcl, and 4 fields of video 1g@ The vehicle is growing.

By the way, by using one of the devices shown in Figures 1 to 3, a fraction of the numerical value is obtained from a disk (for example, i is the number studio in a television station, and i is the number classroom in a school). If we consider a device that overloads static IfI signals at the same time, a problem similar to the one described above arises.That is, if there are requests to send stationary IfI signals from two terminals in a temporal storm, one of the first
The requested quiescent ll1II is obtained at the other second terminal until the filling of the terminal is completed. However, there is a waiting time. When using the conventional device shown in Fig. 1, this waiting time is 0.4 times longer than the transfer time for one field to the terminal of %tg1, which is the time required for information transfer to the second terminal. The time is approximately 0.8 seconds. Although this waiting time line is relatively small, the image quality is likely to deteriorate as described above.

When the conventional device of FIG. 2 is used, the 1Iiii quality is improved, but the waiting time is doubled. Furthermore, when the conventional device shown in FIG. 6 is used, the image quality is excellent, but the waiting time is 2. , 4 seconds is a must.

When the still image reproducing and transmitting apparatus from two or more terminals is rarely powered up, the waiting time increases dramatically.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a still image reproducing and transmitting device with less waiting time and good image quality.

An example of a specific embodiment of the present invention will be explained below with reference to the drawings.

FIG. 4 is a schematic diagram of the entire block (b).

An example of a recording medium is a disk +13 with FX, and a plurality of playback output threads 1.2.3, which will be described later, with the same configuration.
(7A), (7B), and (70) are arranged in sequence to enable the transfer of the emotion of the video signal reproduced from this disc (13).

These plurality of recycled output yarns 1, 2, 3... (7
For each of h) C7 and 3) (7C)..., the corresponding example is a plurality of stores 1, 2, . . . having a monitor art dealer, etc.
6... (8A) (8B) (8C)...
is connected δ.

Said bark I#! Signal information transfer is carried out using the video frame 1g whose time axis is slower than that of the regular video 1g. Ru.

Recycled output yarn 1.2% 6... (7A) (7tl
)(,7C)......The bark * signal is transferred to the playback output thread 1.2.6...(7A), which will be described later.
(7i:1) (7(,:)...... are stored in each memory utn, and are output one after another on the regular time axis, so that the terminal 1゜2.6... (8A )(1:1Ll)(
8C)... will be sent.

On the other hand, % terminal 1.2.6... (,8A)C88)
C8C)... Based on the big quiescence @Imao sending request, quiescence ll1Ii request command 11! I OUT
(JRI) ER is triggered. This still image Sangukan Reibin No. OU'l' (JRDER line, reproduction output yarn control section (9)
given to. This is cool, playback output yarn control 41! l
OUT CON'i'ROJ)'G Sale 6゜CoO)
4% raw output yarn control signal OLI'l' U (JN'1RO
L is #'i, even if it is a still-playback send request or from terminal 1 (8A).

Corresponding memo 9-Qt of recycled output yarn 1 (7A)
To l.

This is a control signal for loading the video signal of the requested still image from the disk (1). In addition, if the still/playback transmission request is out of time with another request, an interrupt for writing a video signal from the disk 11) can be made.

The reference synchronization signals Ref and MYNC are pulses that determine the timing for these write or L write interrupts or continuations, etc.), and also the address signal for memory O write and read. This is the reference signal when creating.

Figure C45 shows the recycled output yarn 1.2.5 (7
A) (7B) (7C) . . . show detailed block circuit diagrams.

Memo v-aah, four first to fourth memory blocks (, 10a) each having a storage capacity of one field.
~ (10d) is made up of 411. The encoded magic signals for 4 fields from the disk (1) are transferred to this memory block, and 1 field is transferred to each of the memory blocks (10a) to (10d) of 181 to 4. It is designed to be filled in one after another.

A memory (a 1G write clock is formed by a write clock forming circuit QJJ) is formed, and the video signal for one field is written in about 0.4 seconds as in the conventional case.

The continuous output of the video m signal written in memory 4 is d output 1
The clock pulse which is the output of the o y I forming circuit u4 is used. The frequency of this clock pulse is set in the same way as the sampling pulse when encoding Eiho No. 18. This results in memory u(2)
Each issue of encoded em with M current time axis from 1 to 1 is served.

Note that the %1-included clock formation path aυ, the successive clock formation circuit u4, and the switch 1 path a1, which will be described later, receive a write command signal WRITE, a write command signal (EAI), and a switching command signal C, which are formed from the timing circuit α. )iANljE
Control is lost by each of the following.

KotL et al. (No. 71a WRITE, READ, C) iAN
Gllq.

Punishment Niu output thread control 1d seen in timing circuit scream)
No. OUT C (JNTROL and reference synchronization signal B, ef,
It is formed based on 8YNC. In addition, this write command 4g WRITE is the video 1g that is requested to be played back.
Note on issue') - Controls writing selection to Qtl, *writing timing, and amount of convolutional video signal. Through this control, multiple terminals 1, 2, 6... (, 8AX,
8B I'm doing it.

Memory U is transferred from disk (1) due to the interrupt request.
When the information transfer of the video signal to U starts, the first memory block (if the writing of the first 1 field is completed, the video signal for the next 1 field will be 11g).
2 block memo! J-(, 10b) The state is switched to a state where it can be loaded. @1 memory block (1
At the point when the writing to 0 is completed, a continuous clock is applied to the first memory block (10a). As a result, the video signal for one field is successively outputted to the color-7 framing circuit for one field, which is the same as that of 1M1. This color 7-raming circuit (4 fields 111 based on the 13th consecutive 1-field projection bias-qtc)
An M'8c color image having linearity is polarized. To the switch circuit α-・At this time, the switching command signal C) IANG
Based on B, the signal is applied to the tangent 1)/A converter aη and converted into analog. This trembling movie (one selected based on the g issue) is painful 1.2.3...
(, 8k) (, 8B) CM:) Displayed on the monitor image rkJ, etc. of...

The still image formed based on the signal number for one field stored in the first memory block (10a) is transferred to the next second memory block (ciob).
! Monitor 1Iiii- until the writing of No. 1N is completed.
etc. will be displayed.

When writing to the memory block @1.2 (10a x 10) is completed, based on the video signal for these 2 fields, the color 7 framing circuit I for 2 fields has 4 field order. NTSC power 9-image*M number ixMM, von6゜This NTSC color Wkm<g number has the 3.4th memory block (10CX10d) recorded with the 11th! The signal is applied to the D/A&*#a7) through the contact (16b) of the switch circuit wrae.

6. When the writing of the video signal to the fourth memory block (IOC) (, 10d) is completed, the memo! This means that video signals for four fields have been written to j-Ql. At this point, a read clock is given to the memory block from the successive clock generator &gJ@u'l). This is 15 for 4 fields! : Image signal or body appears one after another. The video signals that have been sent out one after another are already 4 of N 'l' 8 C.
It has field sequentiality. Therefore, these video signals can be converted to switch @ without color processing.
Transmission through the contact (, 16C) of the circuit 111, L)/A conversion im! (17) Display the stationary screen on the monitor screen, etc. from f6° &, 111 Lm, 1m End 1.
2.・−・−(dAX8t$88e)・・・・・・
・The content of the memory song is repeatedly outputted one after another in the other stationary tatami mats or 60 reeds, for example, the playback output thread 1 (7A) memo') -ulG and the disk (1
), the video signal is transferred ON-, and while it is being input 7, there is a stationary output request from another terminal 2 (, dB). 1 (, 7A) When the memory song of 1 (, 7A) is written for 1 field at the beginning of the shark, at an appropriate time after writing that 1 field,
After writing the subsequent fields, at i6, the writing is immediately stopped at an appropriate time. As a result, terminal 2
(8B) 4 corresponding playback output thread 2 (711) Disc to memory song (lj to 1 #! Interruption of the common name of the mate number to 5'J rudder 00 Next, Niu output Insert into the memory Qt# of 1st thread 2 (713) the contents of the first field of still image 11, which is displayed from 2nd block (8B). Based on this one field video signal, a friend still image is selected and displayed on the monitor screen of terminal 2 (8B).

■ Next, the vow of ■ is finished') Next, I/'i, stop convolution at ■ and 7'C Memo of Niu output thread 1 (7 people)') - (Let 11 continue writing 0 ■ Next, when the budding of ■ fades, in ■ - the memory a of the playback output thread 2 (7B) in which only the first one field of the shark was written, Convolution.

As mentioned above, the playback output system 1.2 (7A) (
7B), and from the time when the video signal for the first field of the mackerel is written to each memory member, the video signal for at least this one field is written. Based on the video signal, a still image is displayed on the monitor 1111 screen of each terminal 1.2 (8A) (8B).

This allows still image playback and transmission between the two terminals 1 and 1.
, 2 (aAX8B), and even when these become 1, there is little time delay at the time of switching, and still images can be reproduced and transmitted with good raw image quality.

In addition, if a static-playback transmission request or three or more terminals 1゜2.6
......(aAX8B) (80)..., and it goes without saying that the same thing can be done even if these overlap in time.

Also, at the same time, the number of requests for static VMH raw sending expenses is 4 and 1.
．． 2.3 (8A) (, 8B) (80) When a is performed, the reproduction output system control section (9) performs the processing according to a predetermined order.

- It is also possible to perform interrupt operations in one time division for field writing. In other words, even when the interrupt for one field is completed, two regenerated output threads are 1.2C7k) (,
7B), for example, 1 field is left with 1m of pitch (
The i1 number may be stored in the memory 4.

In addition, the color frame mink time @a脣 in Fig. 1 may be changed to 4QL. In this case, it becomes a two-contact switch that selects the output from the switch circuit uoL color framing repair u increase and the composite cutting edge of the first to fourth memory blocks (10a) to (, 10d). With this configuration, almost the same effect as the embodiment shown in FIG. 5 can be obtained. Moreover, circuit #
1st relative becomes easier. However, the second memory block (1
After the video signal is convoluted into 0b), the 6.4th yt Molib Oy returns (10c) (10d)! The image quality is a little worse than that in Figure 5, but it is acceptable for practical use.The color framing times described above are for one field or two fields. The chroma signal C is divided into the luminance signal Y and μ711C, and the chroma signal C and the phase-inverted chroma signal C are added to the separated luminance signal Y and the phase-inverted chroma signal C is appropriately set to 0.
This is a well-known method in which the video signal is added with a line delay and without '#II so that a video signal having NTSC' field sequentiality can be obtained.

In summary, the present invention provides T2O ( The purpose of this invention is to make it possible to input images from a distribution medium into memory in order to reproduce and transmit a still image by No. 7J sequential order.

As a result, even if the number of still images from a plurality of terminals is 1, the still image based on the video signal for at least one field can be quickly sent to each terminal. Therefore, it is possible to shorten the time required to switch between stationary and stationary 1 at the terminal. Furthermore, when the video signals for 4 fields have been written to the valley memory, it is possible to obtain a % high-quality image in order to form a still image based on the video signals for 4 fields. I can do it.

[Brief explanation of the drawing]

Figures 1g1 to 6 are block diagrams showing the lid of a conventional still image reproducing and transmitting device, respectively, and Figure 4 is a block diagram showing the lid of a conventional still image reproducing and transmitting device.
Overall block (9) schematic diagram illustrating an example of Nyugome Dechano,
FIG. 5 is a block circuit diagram of the reproduction output system of FIG. 4. Furthermore, in the previous issue, it was used for Yakuen. tlJ・・・・・・・・・・・・・・・・・・・・・Tisf (7A) (7 to 3) (7C)...Regenerated output yarn (
Required) <db><bC)...Terminal αQ......Memory (ioa) ~(,10d)...1st to 4th Memory block α31041...
...Color framing circuit αQ...
・・・・・・・・・・・・・・・It is a switch circuit. Agent Yoshih Tsuneko

Claims (1)

[Claims] A video signal obtained from a recording medium is written in a memory on a time axis similar to a regular video signal, and the video signal is sequentially output from the memory on a regular time axis and reproduced on a plurality of terminals. In a stationary 1118 production device configured to deliver,
A plurality of playback output systems are provided corresponding to the plurality of terminals, and each of the playback output systems includes the memory, and it is possible to write to the memory of the other playback output system while writing to the memory of the #memory playback output system. and interrupt control means. % reproduction output system forms an NT8C color video signal having 4-field drive characteristics from the memory capable of storing video signals for 4 fields and the memory output for at least 1 field; A framing circuit and a switch U path for selecting the output of the 2-7 framing circuit or selecting the output of the 2-7 framing circuit for 4 fields of memory, and one reproduction output system memory. During the convolution operation, still image playback and transmission from another terminal 1! '
When X occurs, the interrupt control means performs a memory write interrupt operation so that at least one field of video entertainment information corresponding to the request for static is written into the memory of the latter playback output system. tL is written in the target σ memory, and based on the -fc barking signal, the hakamou output is sent out to the other frame through the color framing circuit (a stationary l!lI tangenkomi output device configured to be L). .